6645674726 has 8 divisors (see below), whose sum is σ = 10493170680. Its totient is φ = 3147951168.

The previous prime is 6645674699. The next prime is 6645674729. The reversal of 6645674726 is 6274765466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645674729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87443051 + ... + 87443126.

It is an arithmetic number, because the mean of its divisors is an integer number (1311646335).

Almost surely, 2^6645674726 is an apocalyptic number.

6645674726 is a deficient number, since it is larger than the sum of its proper divisors (3847495954).

6645674726 is a wasteful number, since it uses less digits than its factorization.

6645674726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174886198.

The product of its digits is 10160640, while the sum is 53.

The square root of 6645674726 is about 81521.0078814044. The cubic root of 6645674726 is about 1880.0945634870.

The spelling of 6645674726 in words is "six billion, six hundred forty-five million, six hundred seventy-four thousand, seven hundred twenty-six".